Then, as she continued, her voice took on a slightly wistful note.

But there is also a newly wistful, elegiac note here.

But at the end, she sounds a more wistful note:

His voice had taken on a reflective note, almost wistful in its tone.

I heard the wistful note in his voice and recognized it immediately.

There was a wistful note in her voice that went to Melissa's heart.

His voice trailed away, leaving a wistful note in the air.

There was a strange, wistful note in his voice.

The wistful note in his voice made her glance up quickly.

She had heard the slightly wistful note in the little lady's voice.